toolbar.add(bt);
this.add(toolbar, 0);
this.add(scroll,1);
this.setBoxAlign(Align.Stretch);
this.clickRecognizer = new DoubleClickRecognizer();
EventBus.getSystem().addListener(listview, SelectionEvent.Changed, new Callback<SelectionEvent>() {
public void call(SelectionEvent event) {
int n = event.getView().getSelectedIndex();
context.getDocument().setCurrentPage(n);